JP2016080483A - Survey method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a survey method which, while suppressing the time and effort required in an examination to check, when cutting a medium surface, whether a substance exists in a medium at a place to be cut, makes it possible for an operator to accurately determine whether the substance exists in the medium.SOLUTION: Provided is a survey method for executing an intra-survey area complementing processing step for complementing an index value at each position within a survey area a in a survey map s generated by, when cutting a medium surface in linear form, providing scanning lines SL so as to surround a cutting place CL to be cut in linear form, locating the cutting place CL within the survey area a, and scanning on the scanning lines SL (SLx1, SLx2, SLy1, SLy2) on the basis of the index value at each position on the scanning lines SL (SLx1, SLx2, SLy1, SLy2), and determining the presence or absence of a substance in the survey area using the survey map s complemented by the intra-survey area complementing processing step.SELECTED DRAWING: Figure 5

Description

The present invention includes a scan line setting step for setting a scan line on the surface of the medium that is the surface of the medium;
A transmission / reception step of radiating a wave signal by electromagnetic waves or sound waves into the medium while scanning along the scanning line and receiving a reflection signal from an object existing in the medium;
At each position scanned in the transmission / reception step on the surface of the medium, an index value indicating a probability that an object exists in the medium is determined based on the reflected signal received at the position, and the determined index value is displayed on the plane. And sequentially executing an exploration map generating step for generating an exploration map mapped to
The present invention relates to a search method for determining the presence or absence of the object in a predetermined search area using the search map.

  In the exploration in such a medium, exploration devices for exploring buried objects or cavities in the ground using reflection of electromagnetic waves are known. The exploration device shown in Patent Document 1 radiates electromagnetic waves toward the ground at a position (x, y) on the ground surface, receives a reflected signal from an embedded object, and receives a reception signal for each reflection time at regular intervals. Measure strength. This exploration device takes positions (x, y) on the ground surface in a grid pattern at regular intervals, and sets the reflection time as z, and data values (received signal strength) at all positions when viewed in the xy plane in xyz space. ) Is obtained, and the three-dimensional data is visualized by applying a migration process.

JP 2000-75025 A

  However, in the above-described exploration device, when investigating the presence or absence of buried objects in the ground, it is necessary to scan the entire surface (ground surface) of the medium that is the exploration target at fine intervals according to the desired resolution. is there. For this reason, for example, there is a problem that it takes time and labor to investigate a buried object that may be present at a planned cutting position during an operation of cutting the medium surface.

  In order to save time and labor, for example, it is conceivable to scan only the place where the presence of an embedded object is to be investigated. However, when there are few parts to be scanned, the scanning result becomes discrete and the operator visualizes the scanning result. There is a problem that it is difficult to determine whether there is an embedded object even if the image is viewed.

  Accordingly, an object of the present invention is to allow an operator to accurately and appropriately reduce the time and labor involved in an investigation for confirming whether or not an object is present in a medium at a location to be cut at the time of cutting the surface of the medium. An object of the present invention is to provide a search method capable of determining the presence or absence of an object inside.

In order to achieve the above object, the characteristic configuration of the exploration method according to the present invention includes a scan line setting step for setting a scan line on the medium surface, which is the surface of the medium, and
A transmission / reception step of radiating a wave signal by electromagnetic waves or sound waves into the medium while scanning along the scanning line and receiving a reflection signal from an object existing in the medium;
At each position scanned in the transmission / reception step on the surface of the medium, an index value indicating a probability that an object exists in the medium is determined based on the reflected signal received at the position, and the determined index value is displayed on the plane. And sequentially executing an exploration map generating step for generating an exploration map mapped to
A search method for determining the presence or absence of the object in a predetermined search area using the search map,
In cutting the medium surface in a straight line,
In the scanning line setting step,
The scanning line is set in a form that surrounds a cutting portion that is scheduled to be cut linearly,
Positioning the cutting location within the exploration area;
A search area supplement processing step of complementing the index value at each position in the search area in the search map generated by the search map generation step based on the index value at each position on the scan line; Run,
The object is to determine the presence or absence of an object in the exploration area using the exploration map supplemented in the exploration area interpolation processing step.

  According to the above characteristic configuration, when the surface of the medium is cut in a straight line, the scanning line is first provided in a form surrounding the cut portion to be cut. Since the scanning line is set so as to surround the exploration area, when an object in the medium enters the exploration area from outside the exploration area, a reflected signal from the object that can exist in the medium is detected on the scanning line. Can be caught.

  Further, since the index value at each position in the search area is complemented based on the index value at each position on the scan line, the index value at each position on the scan line is reflected in the entire search area. . This makes it easier for the operator to look at the exploration area of the exploration map, and it is relatively easy for the object to be present in the medium at the planned cutting position in the exploration area, compared to the case where the index value exists only on the scan line. It can be confirmed whether or not.

  As described above, when cutting the surface of the medium, the operator can accurately check whether there is an object in the medium while reducing the time and labor involved in checking whether there is an object in the medium at the planned cutting position. Can be provided. This exploration method can be suitably used particularly when the object in the medium is an object provided in a straight line such as an embedded pipe or a reinforcing bar.

A further feature is that the exploration area is set to a rectangle,
In the scanning line setting step,
The scanning lines are four corresponding to each side of the rectangle,
Each of the scan lines is set to include the rectangular side corresponding to the scan line on the scan line.

  According to the above characteristic configuration, the operator only needs to scan the exploration device four times in a straight line around the portion to be cut. In general, it is easier to scan an exploration device in a straight line than in the case of a non-linear scan, so the time and labor involved in an investigation to confirm whether an object is present in the medium at the location to be cut. Can be suppressed more suitably.

In another feature configuration, in the search area supplement processing step,
For each position on the scan line, at least each position in the search area from the position to a position where the cut portion exists when viewed in a direction perpendicular to the scan line and in a direction parallel to the scan line. The index value of the position is determined based on the index value of each position on the scanning line.

  According to the above characteristic configuration, the index value from each position on the scan line to the closest position of the cut portion in the direction perpendicular to the scan line is calculated based on the index value at each position on the scan line. decide. That is, since index values are determined at each position from the scanning line in all directions to a position that reaches at least the cutting location, the index values are complemented at all positions in the search area.

  Further, on the exploration map supplemented with the index value in the exploration area, it is indicated in which direction the object is present with respect to the cut portion. Therefore, the operator can accurately determine the presence / absence of an object in the medium while reducing the time and labor involved in the investigation for confirming whether the object is present in the medium at the location to be cut, and the object in the medium. It is possible to provide an exploration method capable of roughly grasping the location of the. This makes it easier for the operator to guess the location of the object in the vicinity of the cutting location, and thus makes it easier to find a place suitable for cutting where no object is thought to exist.

Another characteristic configuration includes a scan line setting step for setting a scan line on the medium surface, which is the surface of the medium,
A transmission / reception step of radiating a wave signal by electromagnetic waves or sound waves into the medium while scanning along the scanning line and receiving a reflection signal from an object existing in the medium;
At each position scanned in the transmission / reception step on the surface of the medium, an index value indicating a probability that an object exists in the medium is determined based on the reflected signal received at the position, and the determined index value is displayed on the plane. And sequentially executing an exploration map generating step for generating an exploration map mapped to
A search method for determining the presence or absence of the object in a predetermined search area using the search map,
In cutting the medium surface into a circular shape,
In the scanning line setting step,
Set the exploration area to include a cutting point that is to be cut into a circular shape,
Two orthogonal scan lines are set in a form that crosses the cut portion, respectively.
A search area supplement processing step of complementing the index value at each position in the search area in the search map generated by the search map generation step based on the index value at each position on the scan line; Run,
The object is to determine the presence or absence of an object in the exploration area using the exploration map supplemented in the exploration area interpolation processing step.

  According to the above-described characteristic configuration, when the medium surface is cut into a circular shape, two orthogonal scanning lines are provided so as to traverse the cutting portion to be cut first. By providing two orthogonal scan lines, compared to the case of providing two non-orthogonal scan lines, it is possible to scan the exploration area more widely, and the reflected signal from an object that may exist in the medium It becomes easy to catch. That is, even when only two scanning lines are present, when an object is present in the medium in the exploration region, the presence can be captured as an index value on the exploration map with relatively high accuracy.

  Further, since the index value at each position in the search area is complemented based on the index value at each position on the scan line, the index value at each position on the scan line is reflected in the entire search area. . As a result, the operator can simply look at the exploration area of the exploration map, and it is relatively easy compared to the case where the index value exists only on the scanning line. It can be confirmed whether or not it exists.

  As described above, when cutting the surface of the medium, the operator can accurately check whether there is an object in the medium while reducing the time and labor involved in checking whether there is an object in the medium at the planned cutting position. Can be provided.

A further feature configuration is that the exploration area is set to a circle defined by an outer edge of the cut location,
In the scanning line setting step,
Two orthogonal scan lines are set to pass through the center of the circle.

  According to the above characteristic configuration, the operator only needs to scan two scanning lines crossing the circle defined by the cutting point. In addition, since the two scanning lines pass through the center of the circle, the probability that an object existing in the cut portion can be found is higher than when the two scanning lines do not pass through the center of the circle. That is, a reflection signal from an object that can exist in the medium can be captured with relatively high accuracy. Therefore, more preferably, the presence / absence of an object in the exploration region can be determined with high accuracy while reducing the time and labor involved in investigating the presence / absence of an object in the medium.

In another feature configuration, in the search area supplement processing step,
For each position on the scan line, the index value at each position in the search area from the position to a closest position of the circumference of the circle in a direction perpendicular to the scan line The point is determined based on the index value at each position on the line.

  According to the above characteristic configuration, the index value from each position on the scan line to the closest position on the outer periphery of the circle in the direction perpendicular to the scan line is calculated based on the index value at each position on the scan line. decide. That is, since the index value at each position from the scanning line in all directions to the closest position on the outer periphery of the circle is determined, the index value is complemented at all positions in the search area.

  Further, on the exploration map supplemented with the index value in the exploration area, it is indicated where the object is present at the cut position. Therefore, the operator can accurately determine the presence / absence of an object in the medium while reducing the time and labor involved in the investigation for confirming whether the object is present in the medium at the location to be cut, and the object in the medium. It is possible to provide an exploration method capable of roughly grasping the location of the. This makes it easier for the operator to guess the location of the object in the vicinity of the cutting location, and thus makes it easier to find a place suitable for cutting where no object is thought to exist.

Schematic diagram of exploration equipment Exploration device block diagram Flow chart showing exploration area supplement processing The figure which shows the exploration area supplement processing at the time of cutter cutting work The figure which shows the exploration area supplement processing result at the time of cutter cutting work Diagram showing exploration area supplement processing during core removal work The figure which shows the exploration area supplement processing result at the time of core removal work

[First Embodiment]
1. Outline of Exploration Device The exploration device 3 according to an embodiment of the present invention will be described below with reference to the drawings. As shown in FIG.1 and FIG.2, one Embodiment of the exploration apparatus 3 is provided with the antenna 31 which is a transmission / reception means, and the control part 30 which processes the signal obtained by the transmitter / receiver as main apparatuses. It is configured. And in this embodiment, the signal processing in the control part 30 has the characteristic.

  Further, as shown in FIG. 1B, the exploration device 3 is scanned along a scanning line SL set in an exploration range SA including a buried pipe X buried in the ground by being manually pushed by an operator. The When scanned along the scanning line SL, the search device 3 emits a search electromagnetic wave toward the ground, processes a reflected wave of the search electromagnetic wave, and exists in the medium below the search range SA. Used to probe the position of an object.

  In the present embodiment, the exploration device 3 is used for exploring the position of the buried pipe X existing in the ground as a medium, with the exploration range SA set on the ground surface. In the present embodiment, the buried pipe X corresponds to “an object in the medium”. In the following, the ground surface corresponds to the “surface of the medium”.

  The search device 3 includes a control unit 30 that outputs a search map s as shown in FIGS. 5 and 7 based on the reflected wave acquired by the antenna 31. In the figure, the position where the probability of existence of the buried pipe X is higher is displayed in white, and the position where the probability of existence is lower is displayed in black. That is, the larger the index value t indicating the probability that the buried pipe X exists, the whiter the color, and the smaller the index value t, the blacker the black. In the present embodiment, the index value t is binarized into two cases: a case where the buried pipe X can exist and a case where the buried pipe X cannot exist. Specifically, when a reflected wave is obtained during scanning of the exploration device 3, the index value t at that position is set to 1, and the index value t when it is not obtained is set to 0.

  In the drawing, the horizontal direction is the x direction and the vertical direction is the y direction. The exploration map s output by the control unit 30 is displayed on the display unit 32 installed at the top of the exploration device 3.

  More specifically, the exploration device 3 is a hand-held radar exploration device, and travels along a scanning line SL set in a predetermined exploration range SA that is a target of exploration work for the buried pipe X. The exploration device 3 may be a self-propelled radar exploration device. The exploration device 3 emits exploration electromagnetic waves from the antenna 31 into the ground while traveling. If the buried pipe X exists in the propagation path of the radiated electromagnetic wave, the exploring electromagnetic wave is reflected there. The reflected wave that is reflected and returned is processed by the control unit 30, and an exploration map s for evaluating the presence of the target buried pipe X is generated.

  The search range SA is generally a specific range on a sidewalk, road, wall of a building, and the like, and the scanning line SL is set in a predetermined pattern within the search range SA. In the present embodiment, an operator performs a cutting operation with a cutter within the search range SA. In the cutting operation, as shown in the cutting part CL of FIG.

  The scanning line SL is provided in a form surrounding the cutting point CL. More specifically, four scanning lines SL are provided so as to draw a rectangle or a square surrounding the cutting point CL. Here, at least one direction among the directions in which the scanning lines SL are provided is provided along the laying direction of the buried pipe X. At this time, a reference marker M that defines the scanning line SL is given to the ground surface of the search range SA as an index. In addition, when the positional relationship of the scanning line SL is known in advance, the reference marker M may not be provided.

  Here, the reference marker M that defines the scanning line SL is, for example, characters or symbols indicating the starting point, the middle point, or the ending point of the scanning line SL, and may be drawn directly on the ground surface with chalk or paint. A marker such as a triangular cone may be placed on the ground. Alternatively, the reference marker M that defines the scanning line SL can be created by a method of drawing a line indicating the scanning line SL or a method of placing a rope. That is, it is important that the actual scanning position and the search data at the scanning position are related by the position of the ground surface of the reference marker M.

  As described above, the exploration device 3 is scanned on the scanning line SL, acquires the index value t at each position on the scanning line SL, and displays the exploration map s so that the operator can perform the exploration range SA. It is comprised so that the presence or absence of the buried pipe X in can be confirmed.

  More specifically, in this embodiment, the exploration device 3 is used to determine the presence or absence of the buried pipe X in a predetermined exploration area a set within the exploration area SA. The search device 3 is characterized by a method for setting the search region a and a method for setting the scanning line SL used for scanning, in accordance with the purpose of determining the presence or absence of only the search region a within the search range SA. Yes.

1-1. Setting of Search Area Setting of the search area a in this embodiment will be described with reference to FIG. In the exploration area a, a range including a portion scheduled to be cut (a range in which it is necessary to confirm the presence or absence of the buried pipe X) is set in a work such as a cutting work performed on the ground surface. More specifically, when the operator cuts the ground surface with a cutter, an area sufficient to confirm whether the buried pipe X under the cutting point CL is affected is set as the exploration area a.

  Specifically, the exploration area a is set to a rectangular area having an offset of a predetermined distance Lo with respect to the cutting location CL so as to surround the cutting location CL to be cut by the cutter. Here, the “rectangle” includes a square. Here, the cutting portion CL by the cutter is cut linearly on the ground surface.

  The search area a includes a position that is a predetermined distance Lo away from each position on the cutting point CL. That is, the outer edge of the exploration area a is set to be at least a predetermined distance Lo in the vertical direction (up, down, left and right directions in the figure) with respect to each position of the cut portion CL. Specifically, the predetermined distance Lo is set to 50 cm, for example.

1-2. Setting of the scanning line When the exploration device 3 is used, the scanning line SL is set according to the exploration area a to be examined for the presence of the buried pipe X before scanning. Scan line SL is set in a straight line. In the present embodiment, the scanning line SL is provided so as to surround the cutting portion CL.

  Specifically, as shown in FIG. 4, the scanning lines SL are four corresponding to the sides of the rectangle that is the outer edge of the exploration region a, and each scanning line SL is on the scanning line SL. Is set to include the rectangular side corresponding to.

  More specifically, the scanning line SL corresponds to the scanning line SLx1 corresponding to the lower side in the figure of the rectangle which is the search area a, SLx2 corresponding to the upper side in the figure, and the left side in the figure. SLy1 and SLy2 corresponding to the right side in the figure.

  These four scanning lines SL are composed of two sets of (SLx1, SLx2) and (SLy1, SLy2). Two scanning lines SL constituting each set are provided in parallel, and different sets of scanning lines SL are provided so as to be orthogonal to each other.

  In addition, each scanning line SL is set so that each side of the rectangle that is the outer edge of the search area a overlaps the scanning line SL, and at the same time, the scanning line SL has the same length as the overlapping side.

2. Detailed Configuration of Search Device As shown in FIG. 2, the search device 3 includes an antenna 31, a control unit 30, and a display unit 32. The control unit 30 performs signal processing on the electromagnetic wave received by the antenna 31, and the display unit 32 displays the exploration map s signal-processed by the control unit 30 in a form visualized to the operator via the display unit 32.

2-1. Antenna The antenna 31 of the exploration device 3 is preferably composed of a plurality of antenna elements. The exploration device 3 transmits a pulsed electromagnetic wave in the microwave region through the antenna 31 to the ground at a predetermined repetition frequency and a transmission unit (both not shown) and the antenna 31 from the ground. A receiving unit (not shown) that receives the reflected wave reflected is provided.

  By the way, the exploration device 3 is moved along the scanning line SL set from the reference marker M, which is an index drawn on the ground with chalk, or from the reference marker M as a starting point. The exploration device 3 is equipped with a position detection sensor unit (not shown) for detecting the movement distance or the movement point. This position data is sent to the control unit 30 and is combined with the reflected wave reflected from the ground and used to create the exploration map s. The position detection sensor unit can be easily constructed by a rotary encoder connected to the traveling wheel, but may be constructed by GPS or a gyro.

2-2. Display Unit The display unit 32 includes a flat panel display that displays the exploration map s in a form that can be visually confirmed by an operator. Specifically, the exploration map s is visualized and displayed in the form shown in FIG. 4B on the flat panel display. As shown in FIG. 1B, the flat panel display is provided on the upper surface of the exploration device 3 in an inclined posture so that it can be clearly seen by an operator who manually pushes the exploration device 3.

2-3. Control unit The control unit 30 includes a microcomputer, a semiconductor memory, and the like. The control unit 30 allows the operator to search for the position of the buried pipe X existing in the medium when the operator scans the exploration device 3 in the predetermined search range SA along the scanning line SL. An exploration map s is generated. The control unit 30 includes a data generation unit 51, a search area supplement processing unit 52, and an output processing unit 53.

2-3-1. Data Generation As shown in FIG. 2, the data generation unit 51 embeds the reception signal input from the reception circuit in a medium determined based on the position on the medium surface and the reflection signal at the position. Are arranged and processed in relation to the index value t indicating the probability of the presence of. Here, the index value t is a value determined based on the reflection time and the reception intensity of the reflected wave, and indicates the existence probability of the buried pipe X.

  The data generation unit 51 is for generating an exploration map s used in the subsequent processing, and an exploration map s (FIGS. 5 and 7) in which index values t at respective positions on the medium surface are mapped on a plane. Reference). In generating the exploration map s, either the vertical direction or the horizontal direction in the figure is set to coincide with the laying direction of the buried pipe X.

  When the exploration device 3 is scanned over the entire range of the exploration range SA, the exploration map s can indicate where the buried pipe X exists in the entire range of the exploration range SA. On the other hand, for example, in operations such as cutting of the ground surface using a cutter, it is only necessary to be able to determine whether or not the buried pipe X is present at a location to be cut. In such a case, it is desired that the presence / absence of the buried pipe X can be determined with less effort and time in order to proceed smoothly.

  In this embodiment, in order to determine the presence or absence of the buried pipe X with less effort and time, the exploration device 3 includes the exploration region supplement processing unit 52. The search area supplement processing unit 52 can determine the presence / absence of the buried pipe X in the predetermined search area a using the search map s while suppressing the number of necessary scanning lines SL (in FIG. 4, four).

2-3-2. Search area supplement processing The search area supplement processing section 52 uses the index value t at each position in the search area a in the search map s generated by the data generation section 51 as the index value t at each position on the scanning line SL. Complement based on

  A method of complementing the index value t at each position in the search area a by the search area complementing processing unit 52 will be described with reference to FIG. As indicated by arrows in the figure, for each position (x, y) on the scanning line SL, at least from the position (x, y) to the scanning line SL in the direction perpendicular to the scanning line SL. The index value t at each position in the exploration area a up to the position where the cut portion CL exists when viewed in the parallel direction is determined based on the index value t at each position (x, y) on the scanning line SL. . In the present embodiment, the index value t at each position in the search area a from the scanning line SL to a position at least a predetermined distance Lo in the vertical direction is determined.

  Here, a half of the distance to another scanning line SL provided in parallel to the scanning line SL is set as a complementary distance L. That is, in FIGS. 4A and 4B, the distance between the scan lines SLy1 and SLy2 is L (Ly), and the distance between the scan lines SLx1 and SLx2 is L (Lx). The complementary distance L is set to a length equal to or longer than the predetermined distance Lo.

  More specifically, in the complementing method according to the present embodiment, a position that is away from the position (x, y) on the scanning line SL in a direction perpendicular to the scanning line SL and that is a complementary distance L that is set to a predetermined distance Lo or more. The index value t at each position in the search area a is determined based on the index value t at each position (x, y) on the scanning line SL.

  Based on the index value t at each position on the scanning line SL, the index value t from the scanning line SL to a position away from the complementary distance L is determined. Therefore, the index value t at each position in the exploration area a is more accurately determined. Can be complemented.

  In the present embodiment, the index value t on the scanning line SL is copied as it is as the index value t at each position in the search area a.

  Below, the flow of the search area complementing process in the present embodiment will be specifically described with reference to FIGS.

  First, one scanning line SL is selected from the four scanning lines SL (# 1). Subsequently, one point on the scanning line SL selected in # 1 is selected (# 2). Specifically, as shown in FIG. 4A, the scanning line SLy1 is selected, and the position (x, y) on the scanning line SLy1 is further selected.

  Next, the index value t at the position (x, y) is copied in a direction perpendicular to the selected position (x, y) to a position away from the scanning line SL by the complementary distance L (# 3). Specifically, the index value t at the position (x, y) is copied to a position (a broken line position in FIG. 3) that is separated from the scanning line SLy1 by the complementary distance Ly.

  Here, when the value is copied into the search area a, if the index value t of another scanning line SL has already been copied (# 4: Yes), it already exists at that position in the search area a. An OR condition between the index value t to be copied and the copied index value t is taken (# 5). That is, if the index value t already existing at the position in the search area a or the copied index value t is 1, it is determined to be 1.

  When a value is copied into the search area a, if no value exists at that position in the search area a, nothing is done (# 4: No).

  The processes of # 3 to # 5 are repeated for each point on the scanning line SL selected in # 1 (# 2). When processing has been performed for all positions on the scanning line SL, the repetition of # 3 to # 5 is terminated (# 6). Subsequently, when the processes of # 3 to # 5 are executed for all the points on the scanning line SL selected in # 1, the processes of # 2 to # 5 are repeated for the unprocessed scanning lines SL (# 1). If the processing is performed for all the scanning lines SL, the repetition is finished (# 7).

  As described above, based on the index value t at each position on the four scanning lines SL (in the case of FIG. 4, the scanning lines SLx1, SLx2, SLy1, and Sly2), The position index value t is complemented.

2-3-3. Output Processing The search map s in which the index value t at each position in the search area a is complemented in this way is subjected to image processing as needed by the output processing unit 53 and output to the display unit 32. By displaying such complemented data on the display unit 32, the operator can easily grasp the presence or absence of the buried pipe X at the planned cutting location in the search area a of the search range SA.

3. Search Method A search method using the search device 3 as described above will be described with reference to FIG. FIG. 5A shows a cutting location CL, a scanning line SL, a search area a, and the like when a cutting operation by a cutter is performed in a specific search range SA. For convenience of explanation, in FIG. 5A, the existence position of the buried pipe X in the exploration range SA is shown in gray. However, during the actual cutting operation, the existence position of the buried pipe X is not displayed, and the operator The location of the buried pipe X cannot be grasped.

  First, the operator executes a scanning line setting step for setting a scanning line SL on the ground surface. As shown in FIG. 5A, four scanning lines SL (SLx1, SLx2, SLy1, and SLy2) are set so as to surround the cut portion CL. In the figure, the scanning line SL is indicated by a broken line.

  Next, as a transmission / reception step, as shown in FIG. 1, the operator scans the exploration device 3 along the scanning line SL. At this time, electromagnetic waves are radiated into the ground by the control unit 30, and a reflection signal from the buried pipe X existing in the ground is received.

  Subsequently, as an exploration map generation step, the data generation unit 51 of the control unit 30 of the exploration device 3 enters the ground for each position (x, y) on the scanning line SL based on the reflection signal received at the position. An index value t indicating the probability that the buried pipe X exists is determined, and an exploration map s in which the determined index value t is mapped on a plane is generated.

  Specifically, as shown in FIG. 5B, the data generation unit 51 generates an exploration map s in which the index value t exists only at each position on the scanning line SL.

  Further, the search area supplement processing unit 52 determines the index value t at each position in the search area a based on the index value t at each position on the four scanning lines SL as a search area supplement processing step. . Specifically, the search map s as shown in FIG. 5C is obtained by the complement processing of the search region supplement processing unit 52.

  Finally, the operator determines the presence / absence of the buried pipe X in the exploration area a using the exploration map s supplemented by the exploration area complement processing unit 52. As shown in FIG. 5C, when the buried pipe X exists in the exploration area a, the exploration area a is displayed in white, and when it does not exist, it is displayed in black. For this reason, the operator can easily grasp whether or not the embedded pipe X is present at the cutting location CL that is scheduled to be cut, and can safely perform the cutting work.

[Second Embodiment]
1. Configuration of Exploration Device In the first embodiment, an example of the complementary processing of the exploration area a when performing a cutting operation with a cutter on the ground surface has been described, but the embodiment of the present invention is not limited to such use. Hereinafter, an example in which a wall surface of a reinforced concrete structure building is used as the medium surface and a circular hole is formed in the wall surface, that is, a so-called core removal operation will be described.

  In the present embodiment, the medium corresponds to concrete, and the material in the medium corresponds to reinforcing bars. In the concrete structure, the reinforcing bars in the vertical wall provided in the vertical direction are usually arranged in a lattice pattern in such a manner that another reinforcing bar is arranged in the horizontal direction with respect to the reinforcing bars arranged in the vertical direction.

  The exploration device 3 differs from the first embodiment in the appearance of the device, but the basic device configuration is the same. The exploration device 3 is a small so-called handy-type exploration device that is configured so that an operator can scan with one hand. It is configured so that it can be grabbed and scanned over a concrete structure.

  First, an operator determines a circular region CS (a planned core removal location) where a core removal operation is performed on the wall surface of a reinforced concrete structure building. In the present embodiment, the circular area CS corresponds to the “cutting place” and the search area a, and the outer edge of the circular area CS corresponds to the “circle defined by the cutting place”.

  In addition, the operator provides at least two orthogonal scanning lines SL in a form that passes through the center of the circular region CS and crosses the cut portion. That is, the scanning line SL is provided in a form that passes through one point on the outer edge of the search region a and another point (SLx, SLy in FIG. 6). That is, the scanning line SL corresponds to the diameter of the circular region CS. Here, it is preferable that the two scanning lines SL have a vertical direction and a horizontal direction along the direction of the reinforcing bars.

  In the present embodiment, as shown in FIG. 6, the search area supplement processing unit 52 at least in the search area a in each direction (x, y) on the scan line SL in both directions perpendicular to the scan line SL. The index value t at each position until reaching the outer edge is determined based on the index value t at the position (x, y) on the scanning line SL. That is, for each position (x, y) on the scanning line SL, the index value t at each position from the scanning line SL to the closest position on the outer edge of the search area a is changed to each position (x, y) on the scanning line SL. ) Based on the index value t.

  Specifically, as shown in FIG. 6A, the index value t at each position (x, y) on the scanning line SLy is copied in the horizontal direction in the figure. As shown in FIG. 6B, the index value t at each position (x, y) on the scanning line SLx is copied in the vertical direction in the figure.

2. Search Method A search method when using the search device 3 according to the present embodiment will be described with reference to FIG. FIG. 7A shows the circular region CS (S1, S2) when the core removal operation is performed in the specific search range SA. For convenience of explanation, in FIG. 7 (a), the position of the reinforcing bar in the search range SA is shown in white, but it is assumed that the position of the reinforcing bar is not known during the actual core removal operation.

  First, the operator sets two scanning lines SLx and SLy orthogonal to each other so as to pass through the center of the circular region CS where the core removal operation is performed. Here, it is assumed that the core removal operation is performed in the two circular regions CS (S1, S2).

  Next, the operator scans the exploration device 3 on the scanning lines SLx and SLy, and the data generation unit 51 of the exploration device 3 shows the circular regions S1 and S2 in FIGS. 7B and 7D, respectively. An exploration map s is generated. As shown in FIGS. 7B and 7D, at this stage, only the position where the reinforcing bar exists on the scanning line SL in the exploration map s is displayed in white.

  Subsequently, as the in-search area supplement processing step, the above-described supplement processing is executed on the search map s by the search area supplement processing unit 52. FIGS. 7C and 7E show the search maps s after complementation for each of the circular regions S1 and S2.

  When the reinforcing bars are arranged in the vertical direction or the horizontal direction as in the circular area S1, the inside of the circular area S1 is displayed in white so as to reflect the actual position of the reinforcing bars. For this reason, the operator can grasp the presence or absence of reinforcing bars in the circular area CS by looking at the exploration map s, and can grasp the arrangement of the reinforcing bars within the concrete. It ’s easy to figure out.

When the reinforcing bars are arranged obliquely as in the circular area S2, the supplemented exploration map s does not reflect the exact position of the reinforcing bars, but the circular area S1 is white. Is displayed. For this reason, even in such a case, the operator can easily grasp the presence or absence of reinforcing bars in the circular region CS by looking at the exploration map s.
[Another embodiment]

(1) In the said 1st Embodiment, although the case where the search area | region a was a rectangle was demonstrated, as long as it is a form surrounding the cutting location CL, another shape may be sufficient. Further, in the second embodiment, the case where the exploration area a is the circular area CS that is the target area for the core removal work has been described, but the shape may be different as long as the circular area CS is included. Moreover, in the said embodiment, although the example in case the center of the search area | region a and the center of the cutting location CL or circular area | region CS corresponds was shown, it is good also as a structure which does not correspond.

  When the search area a and the center of the cut area CL or the circular area CS do not coincide with each other, the method of complementing the index value t at each position in the search area a is not limited to the method of the above embodiment, Any other method may be employed as long as it is easy for the operator to determine whether an object is present in the medium in the circular region CS.

(2) In the first embodiment, as a method of complementing the search area a by the search area complementing processing unit 52, the search area a is separated from the position (x, y) by a complementary distance L in the direction perpendicular to the scanning line SL. Although the method of complementing up to the position is shown, other methods may be used. For example, when there is an index value t indicating that the buried pipe X is present in any one of the four scanning lines SL, all the index values t in the exploration area a are set to 1, That is, it may be a value indicating that the buried pipe X exists.

(3) In the above embodiment, binary values of 1 or 0 are used as the index value t. However, multi-tone values may be adopted. Specifically, the index value t may be determined in multiple gradations according to the existence probability of the buried pipe X. In this case, the exploration area complementing processing unit 52 determines that the exploration area a in the exploration area a becomes smaller as the position is farther from the scanning line SL based on the index value t at each position (x, y) of the scanning line SL. The index value t at each position can be determined.

(4) In the above embodiment, an example in which the exploration device 3 radiates electromagnetic waves as wave signals has been described, but sound waves may be radiated as wave signals.

(5) In the first embodiment, an example in which the exploration device 3 explores the ground as a medium. In the second embodiment, an example in which the exploration device 3 explores concrete as a medium. Although described, other media may be used. In the first embodiment, the example in which the object to be searched by the searching device 3 is the buried pipe X has been described. However, for example, other objects such as electric wires existing in the ground may be searched. In addition, in the said 2nd Embodiment, although the example in case the object which the search apparatus 3 searches is a reinforcing bar was shown, an optical cable etc. may be sufficient, for example.

(6) In the first embodiment, the complementary distance L is half of the distance to another scanning line SL provided in parallel to the scanning line SL, but it may be a different length. Note that at least the predetermined distance Lo is preferable because the position from each scanning line SL to the cutting point CL can be complemented without omission.

  According to the present invention, when cutting the surface of the medium, the operator can accurately detect the object in the medium while reducing the time and labor involved in the investigation for confirming whether the object is present in the medium at the planned cutting position. It can be used as an exploration method that can determine the presence or absence.

CL: cutting point Lo: predetermined distance SL: scanning line SLx: scanning line SLx1: scanning line SLx2: scanning line SLy: scanning line SLy1: scanning line X: buried tube (object)
a: Exploration area s: Exploration map t: Index value

Claims (6)

A scanning line setting step for setting a scanning line on the surface of the medium that is the surface of the medium;
A transmission / reception step of radiating a wave signal by electromagnetic waves or sound waves into the medium while scanning along the scanning line and receiving a reflection signal from an object existing in the medium;
At each position scanned in the transmission / reception step on the surface of the medium, an index value indicating a probability that an object exists in the medium is determined based on the reflected signal received at the position, and the determined index value is displayed on the plane. And sequentially executing an exploration map generating step for generating an exploration map mapped to
A search method for determining the presence or absence of the object in a predetermined search area using the search map,
In cutting the medium surface in a straight line,
In the scanning line setting step,
The scanning line is set in a form that surrounds a cutting portion that is scheduled to be cut linearly,
Positioning the cutting location within the exploration area;
A search area supplement processing step of complementing the index value at each position in the search area in the search map generated by the search map generation step based on the index value at each position on the scan line; Run,
An exploration method for determining the presence or absence of an object in the exploration region using the exploration map supplemented in the exploration region interpolation processing step. The exploration area is set to a rectangle,
In the scanning line setting step,
The scanning lines are four corresponding to each side of the rectangle,
The search method according to claim 1, wherein each of the scanning lines is set to include the rectangular side corresponding to the scanning line on the scanning line. In the exploration region interpolation processing step,
For each position on the scan line, at least each position in the search area from the position to a position where the cut portion exists when viewed in a direction perpendicular to the scan line and in a direction parallel to the scan line. The search method according to claim 2, wherein the index value of the position is determined based on the index value of each position on the scan line. A scanning line setting step for setting a scanning line on the surface of the medium that is the surface of the medium;
A transmission / reception step of radiating a wave signal by electromagnetic waves or sound waves into the medium while scanning along the scanning line and receiving a reflection signal from an object existing in the medium;
At each position scanned in the transmission / reception step on the surface of the medium, an index value indicating a probability that an object exists in the medium is determined based on the reflected signal received at the position, and the determined index value is displayed on the plane. And sequentially executing an exploration map generating step for generating an exploration map mapped to
A search method for determining the presence or absence of the object in a predetermined search area using the search map,
In cutting the medium surface into a circular shape,
In the scanning line setting step,
Set the exploration area to include a cutting point that is to be cut into a circular shape,
Two orthogonal scan lines are set in a form that crosses the cut portion, respectively.
A search area supplement processing step of complementing the index value at each position in the search area in the search map generated by the search map generation step based on the index value at each position on the scan line; Run,
An exploration method for determining the presence or absence of an object in the exploration region using the exploration map supplemented in the exploration region interpolation processing step. The exploration area is set to a circle defined by the outer edge of the cut location;
In the scanning line setting step,
The search method according to claim 4, wherein two orthogonal scan lines are set so as to pass through a center of the circle. In the exploration region interpolation processing step,
For each position on the scan line, the index value at each position in the search area from the position to a closest position of the circumference of the circle in a direction perpendicular to the scan line The search method according to claim 5, wherein the search method is determined based on the index value at each position on the line.